Tooth whitening apparatus



FIG. 1 is a top perspective view of a tooth whitening apparatus showing our new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a side view thereof;

FIG. 6 is a side view of the opposite side thereof;

FIG. 7 is a rear view thereof;

FIG. 8 is a front view thereof; and,

FIG. 9 is an enlarged view of the encircled region depicted in FIG. 1.

The even-length broken lines depicting the remainder of the tooth whitening apparatus show features that form no part of the claimed design. The uneven-length broken lines shown in FIG. 9 form no part of the claimed design. 

CLAIM The ornamental design for a tooth whitening apparatus, as shown and described. 